Summary: A new, secure, and user-friendly approach to graphical CAPTCHAs that is resistant to machine learning and image-recognition approaches, and is suitable for mobile devices.Keywords: CAPTCHA, HCI, Artificial Intelligence.PDF download:

"Solid State Drives: The Beginning of the End for Current Practice in Digital Forensic Recovery?"
Graeme B Bell, Richard Boddington. Journal of Digital Forensics, Security and Law, 5 (3): December 2010.

Summary: SSDs can behave autonomously in a way that hard drives do not, which makes present forensic treatment of computer storage outdated and unreliable. This paper explains how SSDs are different from hard drives, and why this matters.Keywords: Digital Forensics, Society and Law, digital evidence, self-contamination, solid-state drive, SSD, garbage collection.PDF download:

Summary: There are mathematical objects that behave like local minima but which do not conform to the normal ideas of local minima. This is particularly important for techniques that rely on minima-detection heuristics.Keywords: Artificial Intelligence, Potential Fields, Local Minimum, Navigation, Robotics, Computer Games.PDF download:

Summary: My PhD! :-) A general introduction to navigation, potential fields and a new fast, simple potential field technique for navigation in robotics and computer games. It doesn't rely on minima-free fields (inefficient) or random behaviour (inefficient, unreliable), and doesn't make reference to any information outside the potential field. The family of techniques is based on a modified discrete gradient descent algorithm.Keywords: Artificial Intelligence, Navigation, Potential Fields, Robotics, Computer Games, Local Minimum, Cinematic Agents.PDF download: